package com.moshang.blog.core.utils;

import okhttp3.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Map;

/**
 * @program: blog
 * @description: ${description}
 * @author: xieweiwei
 * @create: 2018-10-18 10:59
 **/
public class HttpUtil {
    private static final Logger log = LoggerFactory.getLogger(HttpUtil.class);


    private static final OkHttpClient client = new OkHttpClient();

    private static final MediaType jsonMediaType =  MediaType.parse("application/json; charset=utf-8");
    private static final MediaType xmlMediaType =  MediaType.parse("application/xml; charset=utf-8");



    /**
     * execute
     * @param request
     * @return
     */
    public static String execute(Request request){
        try {
            return client.newCall(request).execute().body().string();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * get
     * @param url
     * @return
     * @throws Exception
     */
    public static String get(String url) {
        return execute(new Request.Builder().url(url).get().build());
    }

    /**
     * post
     * @param url
     * @param body
     * @return
     */
    public static String post(String url, RequestBody body){
        return execute(new Request.Builder().url(url).post(body).build());
    }

    /**
     * post
     * @param url
     * @param formMap
     * @return
     */
    public static String post(String url, Map<String, String> formMap){
        FormBody.Builder form = new FormBody.Builder();
        if (formMap!=null && !formMap.isEmpty()) {
            for(String key : formMap.keySet()){
                form.add(key, formMap.get(key));
            }
            return post(url, form.build());
        }
        return null;
    }

    /**
     * post
     * @param url
     * @param body
     * @param mediaType
     * @return
     */
    public static String post(String url, String body, MediaType mediaType) {
        return post(url, RequestBody.create(mediaType, body));
    }

    /**
     * post (json)
     * @param url
     * @return
     */
    public static String postJson(String url, String body) {
        return post(url, body, jsonMediaType);
    }

    /**
     * post (xml)
     * @param url
     * @param body
     * @return
     */
    public static String postXml(String url, String body) {
        return post(url, body, xmlMediaType);
    }
    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param)
    {
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try
        {
            String urlNameString = url + "?" + param;
            log.info("sendPost - {}", urlNameString);
            URL realUrl = new URL(urlNameString);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (out != null)
                {
                    out.close();
                }
                if (in != null)
                {
                    in.close();
                }
            }
            catch (IOException ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

}
